Organic and inorganic sulfur in coal

摘要: The forms of sulfur in a broad sampling coals were analyzed, and sources analytical errors repeatability, reproducibility, representativeness identified. Maceral encapsulation pyrite can lead to the determination organic content some coals. If corrected for, this reduce amount attributed being sulfur. Also, few cases, elemental is present coal amounts order tenths weight percent. In Lower Freeport coal, form accounts for more than 50% recorded as Generally, crystalline found range zero tens micrograms/gram. Sulfur K/sub ..cap alpha../ x-ray line shifts intensities are used direct raw desulfurized Total sulfur, pyritic sulfatic determinations provided wide variety representing different ranks. Leached residues from procedures examined residual pyrite. Analytical comparisons inmore » crushed leached show no systematic differences content. Thus chemical leaching treatment HC1 followed by HNO/sub 3/ has major effect on determined analyses subsequent ASTM (for standard analyses). 6 tables.« less